Bellmail contained a vulnerability which allowed non-privileged users to escalate privileges through the email archiving functions 's' and 'w'. Due to lax access controls, attackers would be able to overwrite, or create, privileged files on the filesystem.
Local Privilege Escalation
Attack Complexity (AC)Low Privileges Required (PR)Low User Interaction (UI)None Scope (S)Unchanged
Confidentiality (C)High Integrity (I)High Availability (A)High